Useful Mitrek Manuals
Click here for instructions on how to order manuals

The list below is from the official Moto list of manuals. Prices listed are August 2007. NLA indicates No Longer Available.

Note the trailing chassis version letter on your radio.   The "A" version chassis are unique and have their own set of manuals.

A-revision Mitrek chassis: ( i.e. TnnJJA-nnnnAx where "n" is a number, and "x" may be blank or one or two letters):

• Low Band low power (25-50MHz) - T51JJA-nnnnA: 6881037E65 NLA
• Low Band high power (25-50MHz) - T71/81JJA-nnnnA: 6881039E70 supplement to the low power manual (i.e. you need both the 37E65 book and the 39E70 supplement for the high power radio - but both are NLA).
• High Band low power (136-174MHz) - T43/53JJA-nnnnA: 6881037E70 NLA
• High Band high power (136-174MHz) - T63/73/83JJA-nnnnA: 6881039E75 supplement to the low power manual ((i.e. you need both the 37E70 book and the 39E75 supplement for the high power radio - but both are NLA)
• UHF low power (406-512MHz) - T34/44JJA-nnnnA: 6881037E75 NLA
• UHF high power (406-512MHz) - T64/74JJA-nnnnA: 6881039E80 NLA
  (despite the official list showing this as a separate manual, it's actually a supplement to the low power manual (i.e. you need both the 37E75 book and the 39E80 supplement for the high power radio).

• Low Band (25-50MHz) - T51/61/71/81JJA-nnnnB, C, D, etc.: 6881045E65 NLA
• High Band (136-174MHz) - T43/53/63/73/83JJA-nnnnB, C, D, etc.: 6881045E70 ($30+)
• UHF (406-512MHz) - T34/44/54/64/74JJA-nnnnB, C, D, etc.: 6881045E75 ($30+)
• 800 MHz - all models - Tn5JJA-nnnnB, C, D, etc.: 6881045E80 ($117+)

• The 800MHz Mitrek is pretty useless in the amateur world... It uses a single oscillator-multiplier chain for both receive and transmit, and the IF is equal to the repeater offset.... something like the old Pulsar series of VHF or UHF mobile telephone.   You could hack and slash at it and make it receive at 900 MHz (it will never transmit at 900 MHz), but there are easier and much smaller radios that work just as well if not better to start with (an 800 MHz Maxtrac comes to mind (and a conversion article is on this web site), or you could use an EFJ 8655 or a Kenwood TK-981 and have a good synthesized mobile radio that transmits and receives).   In short, the 800 MHz Mitrek radios make pretty good doorstops.
• If you are going to do a mobile install of a Mitrek, and you can find the installation guide at zero or very low cost then it's worth spending five minutes and looking it over... the Mitrek Installation manual is 6881110E50
• The standard control heads and cables are covered in the regular mobile manual. Moto also offered the "Systems 90" control groups for the Micor, Mitrek and Syntor line for mobile installations that needed multiple radios, scanning, MPL (operator controlled multiple PL encoder tones), etc. The "Systems 90" controls are covered in their own manuals:
  • Siren / PA....6881108E05 ($11.26)
  • Alternate Control Module... a 4-channel control head on a card... 6881109E56 ($7.52)
  • Channel Scan.....6881102E23 NLA
  • Channel Scan.....6881109E58 NLA
  • Voice Privacy Adapter....6885900C35-F NLA
  • Multi-PL encoder.....(don't have it yet)
  • Wildcard....6881102E35   NLA (just a board with momentary and latching switches, configurable by the installer... light bar, siren, dome light, stop light kill, etc).
  • The complete module wiring diagram showing how all the units cable together is 6881109E49.
  If anyone has PDFs of any of the System 90 manuals we'd appreciate an email so we can offer them for download.

A note on mobile installs... Mitreks make great install-them-and-forget-them radios. Several friends have 4-channel Mitreks stashed in the trunk or under the back seat in their cars, and set up on a couple of local repeaters. A couple of the UHF ones are configured for full duplex, with two antennas, and until you have actually USED a full duplex mobile you don't know what you are missing, especially on a autopatch or a remote base. And the receive antenna can be shared with something else.

That said, a lot of Mitreks were installed in the cabs of 18-wheel tractor-trailers.   Because the truck manufacturers (Mack, Kenworth, Peterbilt, etc.) had not standardized the polarity of their tractors when the Mitrek was introduced, it was common for Mitrek cables to be modified in the field from negative to positive ground when a positive ground truck was encountered.   As a result, you will find some cables on the surplus market labeled for negative ground but wired for wired for positive gound, in other words part numbers stamped or printed on cable assemblies may not correctly reflect the polarity for which they are wired.   It is best to refer to the negative ground and positive ground cable diagrams in the service manual and compare them to the cable at hand before you power up the radio on the bench, or before installation - look at the diagrams and compare them, then take 30 seconds with an ohmmeter and check. (thanks to KI4BQQ for the reminder)

Information common to the Mitrek and the MSR-2000

Channel elements for the Mitrek and MSR   By Mike Morris WA6ILQ The Mitrek and the MSR2000 are crystal-based radios, and the crystals are installed in self-contained oscillator-tripler plug-in modules (called Channel Elements). Earlier products used crystals, or crystals in miniature ovens. Here's why: Why should you really spend $50 to re-crystal a channel element or ICOM?.

Mitrek Mobile Radios

First, let's figure out what chassis you have:
Mitrek Model and Chassis Numbers    Identifying the better Mitrek Model and Chassis Numbers    By Mike Morris WA6ILQ

RF related Information

Low Band (30-50 MHz)